Dimethylcarbamoyl Chloride → (R)-tetrahydrofuran-3-yl 3-(2-(dimethylcarbamoyl)-2,3-dihydro-1H-spiro[isoquinoline-4,4'-piperidine]-1'-yl)-8-azabicyclo[3.2.1]octane-8-carboxylate

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Reaction Steps

(R)-tetrahydrofuran-3-yl 3-(2,3-dihydro-1H-spiro[isoquinoline-4,4-piperidine]-1′-yl)-8-azabicyclo[3.2.1]octane-8-carboxylate (20 mg, 0.047 mmol) was dissolved in CH2Cl2 (1 mL) and treated with a solution of dimethylcarbamic chloride (20 mg, 0.13 mmol) in CH2Cl2 (100 μL). A solution of diisopropyl ethylamine (20 μL, 14.8 mg, 0.11 mmol) was added. The resulting mixture was allowed to stand at room temperature for 10 min and was then purified by LC/MS (10-99% CH3CN—H2O, with 0.03% TFA, 9 min) to provide (R)-tetrahydrofuran-3-yl 3-(2-(dimethylcarbamoyl)-2,3-dihydro-1H-spiro[isoquinoline-4,4′-piperidine]-1′-yl)-8-azabicyclo[3.2.1]octane-8-carboxylate. LC/MS m/z [M+H]+ 497.4, retention time 2.15 min (10-99% CH3CN—H2O gradient, with 0.05% TFA, 5 min).

Provenance & Evidence